RE: Retrospective study. Is that reliable?
I say it is. A retrospective simply means they analyzed REAL CASES where Hydroxycholoroquine was applied in their health system for Covid-19.
Unless, it is fake data ( like the one published in Lancet ),I say it is pretty reliable as it is WITHIN their own hospital system.
It works for me. The only time I have seen where this medicine didn’t work was report from the veterans administration that was quickly found to be incredibly misleading